If you followed the instructions for Enabling the Windows Subsystem for Linux and installing the Rhyolite-MELTS GUI on a laptop with a high-resolution screen, such as the Surface, you may find that the rhyoliteMELTS display looks tiny. This is due to Xming incorrectly reporting to Windows that it is able to deal with the high resolution. The problem is not restricted to Xming. Other software, such as Adobe Illustrator, Photoshop, CorelDraw and Dreamweaver have shown similar behavior.

A workaround involves adding a text file (the 'manifest') and telling Windows to handle the application scaling for the high resolution screen. The method outlined here borrows from write-ups by scrambler, Luis, and Dan Antonielli. This version uses the command line (cmd.exe) so that you can copy and paste the commands. The external manifest hack requires admin access. If you do not have admin access, or are not comfortable with editting the registry, you can use Windows' Ease of Access tools as a workaround; scroll down to the bottom for this alternative.

External Manifest file (requires admin access)

First we need to open cmd.exe as an Administrator. You can find 'Command Prompt' it in the Start Menu, under 'Windows System'. Right-click 'Command Prompt', then 'More', then 'Run as administrator'. Or right-click the Start button, then 'Run', then type 'cmd.exe'; then right-click the Command Prompt icon in the task bar, then right-click 'Command Prompt' and 'Run as administrator'. You may need to select 'Yes' and/or enter your Windows password.

The Command Prompt will open in the C:\Windows\system32 directory. First navigate to a folder in your home space, somewhere to put a backup file that you will be able to find. For example, 'cd C:\Users\your_username\folder_name'. Next right-click where is says 'Administrator: Command Prompt' at the top of the window and choose 'Properties'. Make sure 'Enable Ctrl key shortcuts' is checked. You can now copy (control-C) and paste (control-V) commands from here to the command line.

... this tells Windows to look in an external file (if available) to see whether a given application can handle the high-resolution screen

Download the manifest.txt file from Dan Antonielli's page. The next instructions assume that your browser saves files in 'Downloads' and that you installed Xming in the default location, but you can adjust accordingly:

You can use the same file trick for other software by replacing 'Program Files' with 'Programs Files (x86)', if appropriate, '\Xming\' with the installation folder, and 'Xming.exe.manifest' with the executable name+'.manifest'. For example:

Photoshop

photoshop.exe.manifest

Illustrator

illustrator.exe.manifest

Dreamweaver

dreamweaver.exe.manifest

CorelDraw (home edition)

drawhome.exe.manifest

Using Magnifier (does not require admin access)

Open Settings (click either the Start button in the bottom LH corner or the Notification icon bottom RH corner; then click the cog icon). Type 'Magnifier settings' in the search box. Reduce the Zoom level increments to 25%. You can experiment with the Magnification zoom level but something in the range 150 - 200% is likely to work. You probably want to leave the 'Start Magnifier...' boxes unchecked and put the Magnifier mode in 'Full Screen'. Turn the Magnifier on, scroll down and right-click the Magnifier icon and choose 'Pin to taskbar'. Now if you turn off the Magnifier (by clicking the 'X' in the top RH corner of the Magnifier popup), you can easily turn it on again by selecting it from the taskbar; the cog on the Magnifier popup is a shortcut to the Settings page.